526 CITRUS FRUITS AND THEIR CULTURE. 



SULPHUROUS ACID SOLUTION, FORMULA (5). 



For Foot Rot. 



Mix together sulphurous acid and water in the pro- 

 portion of three of the former to seventeen of the latter. 



RESIN WASH, FORMULA (6). 



For winter use against White Fly and Scale Insects. 



Resin 30 pounds. 



Caustic Soda (98 per cent.) 8 pounds. 



Fish oil 41-2 pints. 



Water, to make . . . .' 100 gallons. 



Place the resin (well broken up), caustic soda and 

 fish oil in a large iron kettle. Pour over them twenty 

 gallons of water and cook well over a good fire for not 

 less than three hours. Then add hot water, a little at a 

 time, and stir thoroughly until there is at least fifty gal- 

 lons of the hot solution. Place this in a spray pump and 

 add cold water to make up 100 gallons, or keep the mix- 

 ture of fifty gallons as a stock solution and dilute with 

 an equal amount of water a,s desired for use. Gold water 

 should not he added during the cooking process, hut a 

 sufficient quantity of hot water should ~be provided for 

 that purpose. 



RESIN WASH, FORMULA (7). 



For White Fly and Scale Insects in summer. 



Eesin 20 pounds. 



Caustic Soda (98 per cent.) 5 pounds. 



Fish oil 3 pints. 



Water, to make 150 gallons. 



Prepare as directed for formula (6). 



